(commonly referred to as an "SHSH blob") is a digital signature used by Apple to verify and allow iOS firmware installations. Because Apple typically only "signs" the latest iOS version, saving these blobs while a version is still signed is the only way to downgrade or restore to that specific version later. How to Save SHSH Blobs (2026 Guide)
Your device must set its boot-nonce to match the generator in your blob. Use a jailbreak tool or futurerestore : shsh host
When a new jailbreak is released for a lower firmware, users who saved their blobs via shsh.host can upgrade or downgrade to that version even months later using tools like futurerestore . (commonly referred to as an "SHSH blob") is
New users often confuse these terms. Here is the distinction: Use a jailbreak tool or futurerestore : When
The most reliable current methods involve using automated tools or online services. Blobsaver (Desktop App)